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Proceedings Paper

Generation of white-light through frequency upconversion in praseodymium-ytterbium codoped nano-structured fluorogermanate glass
Author(s): Artur S. Gouveia-Neto; Nathalia P. S. M. Rios; Luciano A. Bueno
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Paper Abstract

Praseodymium-ytterbium codoped fluorogermanate nano-structured phosphors for solid-state lighting were synthesized by thermal treatment of precursor glasses. Room temperature luminescence features of praseodymium-ytterbium ions incorporated into low-phonon-energy PbF2 nanocrystals dispersed into the fluorogermanate glass matrix and excited with near-infrared light emitting diode laser was evaluated. The luminescence spectra exhibited predominant emissions in the 475-500, 520-530, and 600-650 nm regions. White-light emission was observed in ytterbium-sensitized praseodymiumdoped phosphor excited at 980 nm. The dependence of the luminescence emisson intensity upon annealing temperature, and rare-earth concentrations was also evaluated. The results indicated that there exist an optimum annealing temperature and activator ion concentration in order to obtain efficient upconversion emission signals with CIE 1946 chromaticity coordinates within the white-light borderline region. Results indicate that the nanocomposite fluorogermanate glassy phosphor is a promissing novel contender for application in white-light solid-state display technology

Paper Details

Date Published: 15 February 2012
PDF: 6 pages
Proc. SPIE 8240, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI, 82401C (15 February 2012); doi: 10.1117/12.905376
Show Author Affiliations
Artur S. Gouveia-Neto, Univ. Federal Rural de Pernambuco (Brazil)
Nathalia P. S. M. Rios, Univ. Federal Rural de Pernambuco (Brazil)
Luciano A. Bueno, Univ. Federal Rural de Pernambuco (Brazil)

Published in SPIE Proceedings Vol. 8240:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI
Konstantin L. Vodopyanov, Editor(s)

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